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Finding the Fourth Proportional to 28,376,636.80, 42,556,660.80 and 10,178,723.20

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Solution

The fourth proportional to 28,376,636.80, 42,556,660.80 and 10,178,723.20 is: 15,265,109.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,376,636.80 : 42,556,660.80 = 10,178,723.20 : x
  2. Step 2: Convert to fraction form
    28,376,636.80/42,556,660.80 = 10,178,723.20/x
  3. Step 3: Cross multiply
    28,376,636.80x = 42,556,660.80 × 10,178,723.20
  4. Step 4: Simplify right side
    28,376,636.80x = 433,172,470,599,490.50
  5. Step 5: Solve for x
    x = 433,172,470,599,490.50/28,376,636.80
  6. Step 6: Final answer
    x = 15,265,109.59

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.